(a) Applicability. (1) This subpart and section 5533 of title 5, United States Code, apply in determining an employee's entitlement to receive pay from more than one position.

(2) This subpart and section 5533(a) of title 5, United States Code, apply only to an employee holding more than one position when the aggregate number of hours worked during a week exceeds 40.

(b) Coverage. This subpart and section 5533(a) of title 5, United States Code, apply to each department and agency (including each corporation owned or controlled by the Government of the United States and including nonappropriated fund instrumentalities under the jurisdiction of the armed forces) in the legislative (except as provided in section 5533(c) of that title), judicial, and executive branches of the Government of the United States and to the government of the District of Columbia.